As of 2014-06-20 this was SanDisk’s top of the line model. It writes faster than any other drive I know of. It comes only in 128GB. It has a durable aluminum case and a lifetime warranty. It comes with AES encryption software, but I don’t think it has built-in hardware in the fob, making it less secure. CrystalMark rates it 260.7MB/s for sequential reads and 245.1MB/s writes. It is drastically slower for random access, but normally you use these devices only for copying (reading and writing files sequentially). Specs. This thing is so big and so fast you could think of it as a portable SSD drive.